Debt (Summary Of Additional Information Of Credit facilities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revolving Secured Line Of Credit [Member]
Debt Instrument [Line Items]
Maximum outstanding balance	$ 187,300	$ 152,500	$ 187,300	$ 152,500
Average outstanding balance	93,801	124,858	98,241	105,804
Warehouse Facility II [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	163,900	240,600	177,200	240,600
Secured financings, average amount outstanding	83,049	211,519	120,960	168,316
Warehouse Facility III [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	71,500	75,000	73,000	75,000
Secured financings, average amount outstanding	63,659	32,813	65,480	34,144
Warehouse Facility IV [Member]
Debt Instrument [Line Items]
Secured financing, maximum amount outstanding	39,200		39,600
Secured financings, average amount outstanding	$ 37,829		$ 37,867